GLsizeiptr GetBoundBufferAvailableSize(const OffsetBindingPointer<Buffer> &binding)
{
Buffer *buffer = binding.get();
if (buffer)
{
if (binding.getSize() == 0)
return static_cast<GLsizeiptr>(buffer->getSize());
angle::CheckedNumeric<GLintptr> offset = binding.getOffset();
angle::CheckedNumeric<GLsizeiptr> size = binding.getSize();
angle::CheckedNumeric<GLsizeiptr> bufferSize = buffer->getSize();
auto end = offset + size;
auto clampedSize = size;
auto difference = end - bufferSize;
if (!difference.IsValid())
{
return 0;
}
if (difference.ValueOrDie() > 0)
{
clampedSize = size - difference;
}
return clampedSize.ValueOrDefault(0);
}
else
{
return 0;
}
}
T CheckedMul(base::CheckedNumeric<T> lhs,
base::CheckedNumeric<T> rhs,
TDiagnostics *diag,
const TSourceLoc &line)
{
ASSERT(lhs.IsValid() && rhs.IsValid());
auto result = lhs * rhs;
if (!result.IsValid())
{
diag->error(line, "Multiplication out of range", "*", "");
return 0;
}
return result.ValueOrDefault(0);
}